--build-stdlib-deployment-targets BUILD_STDLIB_DEPLOYMENT_TARGETS A space-separated list that filters which of the configured targets to build the Swift standard library for, or "all". --swift-darwin-supported-archs ARCHS Semicolon-separated list of architectures to configure on Darwin platforms. If left empty all default architectures are configured. --swift-darwin-module-archs ARCHS Semicolon-separated list of architectures to configure Swift module-only targets on Darwin platforms. These targets are in addition to the full library targets.